LM2578AN/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2578AN/NOPB is a monolithic integrated circuit from Texas Instruments designed as a switching regulator. It supports buck, boost, and inverting DC-to-DC voltage conversion topologies. The device operates with an input supply voltage range of 2V to 40V and delivers an output current up to 750 mA. Key electrical parameters include a switching frequency between 16 kHz and 24 kHz, a 1.0V reference voltage at the inputs, and a maximum duty cycle of 90%. It features built-in current limiting and thermal shutdown protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Supports buck, boost, and inverting DC-to-DC converter configurations
• Includes inverting and non-inverting feedback inputs with 1.0V reference
• Integrates current limit and thermal shutdown protection functions

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for distributed power systems
• Pre-regulators for switching regulators
• Simple step-down (buck) converters
• Boost converters for higher voltage applications
• Inverting (negative) voltage converters

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the package type matches the required mounting style, as the 'AN' suffix typically indicates a PDIP package. Confirm the specific revision of the datasheet to ensure compatibility with design requirements. Check for RoHS compliance status indicated by the NOPB suffix. Ensure the supplier provides genuine Texas Instruments components to avoid counterfeit risks.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a versatile switching regulator capable of multiple topologies is needed. It is suitable for applications requiring input voltages up to 40V and output currents around 750 mA. Consider the lower switching frequency compared to modern high-frequency regulators, which allows for smaller passive components but may result in larger overall solution size. Evaluate thermal performance based on the expected load and ambient conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2578 series is part of Texas Instruments' legacy line of switching regulators. The LM2578A variant offers improved performance characteristics. This component serves as a foundational building block for various power supply designs, offering flexibility through its ability to configure different converter types using minimal external components.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements should be sought within the LM2578 family or compatible Texas Instruments switching regulators. Verify pinout compatibility and electrical specifications such as input voltage range and output current capability before substitution.